My wife quit smoking a couple of years ago but had smoked in her Honda Passport for several years. She kept *****ing about the smell in the Honda so I bought an ozone generator on ebay for around $200. It's an industrial grade one. Don't get the cheap plastic ones. Anyway, ran it in the Honda for a half hour with the car off and a half hour with it on and the AC running. Smells are completely gone. I highly recommend buying one. Hope this helps.